Create a 1-* association and make 1 the owner of it.
Is it possible to add a 1 to many association from one attribute to another, so that 1 is the owner of it? Use case: Booking time slots, entity “Reservation”. A reservation in a calendar should refer to multiple instances of “Order” (a list of orders basically) but an order should only refer to one reservation. I already considered if I could need a many to one association from Order to Reservation and then a 1 to 1 from Reservation to Order to achieve this? Is that true or does it work on an easier way?